Revolving rinse mechanism



Nov. 1, 1955 c. LOT EI'AL REVOLVING RINSE MECHANISM 2 Sheets-Sheet 1Filed June 8, 1954 f INVENTORS l LEON a. LOT

ARTHUR w HAAS n ATTOR EYS NOV. 1, c LOT r AL REVOLVING RINSE MECHANISM 2Sheets-Sheet 2 Filed June 8, 1954 INVENTORS LEON 6. LOT

BY ARTHUR W H.445 A7 ORA/E);

United States Patent REVOLVING RINSE MECHANISM Leon Cyril Lot and ArthurW. Haas, Rochester, N. Y., assignors to Toledo Scale Company, Toledo,Ohio, a .corporationof NewJersey This "invention relates to dishwashingmachines, and

in particular to an improved tiltable wash and rinse assembly for suchmachines.

Heretofore, the lower wash manifolds in dishwashing machines have been'tiltabl-y supported so as to facilitate the removal of "scrap screenslocated below the manifolds. However, the ower rinse assemblies whichare often of the revolving type "have not been so tiltably supported.The combination of -a tiltabl'e wash manifold and a non-tiltablerevolving 'rinse assembly has been unsatisfactory 'in several Ways. Thenon-'tiltable revolving rinse assembly gets in the way when refuseloaded scrap screens, which are located below the rinse assembly, areremoved from the dishwashing machine. Furthermore, when the washmanifold is tilted, there is danger that it will slip and fall upon anddamage the :non-tiltable revolving rinse assembly.

The object of this invention is to provide, in a dishwashing machine, awash assembly and a revolving rinse assembly whichassemblies may betilted as a unit whereby scrap screens may be easily removed from themachine and whereby there is no independent tilting move- :ment ofeither assembly.

More specifically the object of this invention is to provide a .fittingrotatably mounted in a dishwashing machine compartment upon whichfitting is fixed both a wash assembly having a horizontal axis ofrotation and a revolving rinse assembly, whereby both the wash assemblyand the revolving rinse assembly may be tilted about said horizontalaxis.

More specific objects and advantages are apparent from the followingdescription of a specific embodiment of the invention.

According to the invention, improved wash and rinse assemblies areprovided for a dishwashing machine. The wash and rinse assembliescomprise a rotatable wash manifold having a closed outer end, at leastone spray tube carried by the wash manifold and extending trans verse tothe axis of rotation of the wash manifold, a fitting fixed to the outerend of the wash manifold, and a revolving rinse assembly fixed to thefitting.

The invention may be more readily understood from the following detaileddescription of a specific embodiment in Which description reference ismade to the accompanying drawings.

In the drawings:

Figure I is a perspective view of a dishwashing machine embodying theinvention.

Figure II is a perspective view of the interior of the dishwashingmachine shown in Figure I with portions broken away to show the improvedwash and rinse assemblies.

Figure III is an end elevational view of the wash and rinse assemblies.

These specific figures are intended merely to illustrate the inventionbut not necessarily to limit its scope.

A dishwashing machine embodying the invention includes a frame 1 havinga washing space enclosed by a vertically movable three-sided door 2. Thedoor '2 is raised or lowered by an operator grasping a handle 3 andsliding the "door up or down. The door "has its two forward cornersguided by. =posts 3a and its two rearward vertical edges guided inchannels '4. A counterweight 5 is op'eratively 'connectedto the-door 2by means of a pulley system 6 to facilitate raising and lowering thedoor.

The frame 1 encloses a tank or washing compartment 7 containing washingsolution which is sprayed onto dishes placed in the wash space above thewashing compartment 7 through slotted spray tubes 8. The washingsolution from the compartment 7 returns to a pump 9 which forces thewashing solution through the spray tubes. A plurality of the spray tubes8 are provided at both the bottonrand'the top-of the washing space.

Additional spray tubes 10 of the revolving type are provided above andbelow the washing space to supply hot rinse liquid from .a fresh watersupply directly onto the dishes for rinsing and sterilizing the dishes.Control of the rinsing operation "is accomplished by anelectrically-operated solenoid 'valve 11.

Operation of the washing and rinsing devices is effected by pushing awash button 12 and a rinse button 13 mounted on -a control box 14located at the right side of the frame 1.

The present invention consists in providing improved wash and riseassemblies for the dishwashing machine, the rinse assembly being of therevolving type. The wash assembly includes awash manifold 15 having aclosed end and an "open end rotatably connected to a washingsolutionsupplypipe 16 at one side of the compartment whereby the washmanifold is tiltable about a horizontal axis. The wash manifold 15 isconnected to the pipe 1 6 by means of a groove '17 cut in the washmanifold mear1its open end and a cooperating shoulder bolt :18 threadedthrough a boss 19 of the pipe 16. The end of the bolt 18 whichcooperates with the groove 17 :both retains the wash manifold 1'5 in thepipe 16 and limits its rotary travel when the wash manifold is turneduntil an end of 'the groove 17 contacts the bolt 18. The washingsolution supply pipe 16 conveys washing solution from the pump '9 to theopen end of the wash manifold 15. :"l'he spray tubes 8 are attached tothe wash manifold 15, are positioned transversely thereto, andcommunicate therewith. The tubes 8 are locked'in place in the manifold15 by means of springs 20 which urge locking pins into engagement with ahole in the open end of each spray tube 8. A cradle 21, at one side ofthe compartment 7, is provided for one of the spray tubes 8 to helpsupport the wash assembly.

The revolving rinse assembly 22 includes a rigid pipe structure 23carrying the revolving spray tube 10 and spray nozzles 24 fixed theretowhich structure 23 has an open end connected to a T or fitting 25. Thefitting 25 is rotatably connected to a rinse water supply pipe 26 torotate on the same horizontal axis as the wash manifold 15, turns onthreads 27 of the pipe 26, and provides communication between the pipe26 and the revolving rinse assembly 22. The fitting 25 is fixed to theclosed end of the rotatable wash manifold 15 and, when the wash manifold15 and its spray tubes 8 are tilted upwardly about its horizontal axisof rotation, the fitting 25 is turned on the threads 27 to tilt therevolving rinse assembly 22 as a unit with the wash manifold 15 aboutsaid horizontal axis. The force of the rinse liquid spraying out of thenozzles 24 causes the spray tube 10 to turn automatically.

During the washing operation, refuse is cleaned from the dishes and iscollected and retained in scrap screens or perforated trays 28 locatedin the washing compartment 7 below the wash and rinse assemblies. Thescrap screens 28 must be taken from the dishwashing machine quite oftento be emptied and cleaned and one of the advantages of the present washassembly and revolving rinse assembly is that the assemblies may be bothtilted as a unit out of the way permitting the scrap screens 28 to beeasily lifted from the compartment 7. Another advantage of this unittilting arrangement is that neither assembly can slip and fall upon anddamage the other, as is possible when one of the assemblies is capableof independent tilting movement. Furthermore, these improvements arepossible without detraction from the high operating efiiciency of thewash assembly and the revolving rinse assembly.

Various modifications and changes in the details of construction may bemade without departing from the spirit and scope of the invention.

Having described the invention, we claim:

1. In a dishwashing machine, in combination, a washing compartment, awashing solution supply pipe at one side of the compartment, a rinsewater supply pipe at the other side of the compartment, a fittingrotatably connected to said rinse water supply pipe, a wash assemblyincluding a wash manifold having an open end for the entrance of washingsolution rotatably connected to said washing solution supply pipe and aclosed end fixed to said rotatable fitting, there being only a singlepassage within the manifold, and a revolving rinse assembly fixed tosaid rotatable fitting, said rotatable fitting providing communicationbetween said rinse water supply pipe and said revolving rinse assembly,whereby both said revolving rinse assembly and said wash assembly may betilted as a unit about an axis of rotation transverse to said supplypipes.

2. In a dishwashing machine, in combination, a washing compartment, aWash manifold rotatably mounted in the compartment and having a closedouter end, there being only a single passage within the manifold, aplurality of spray tubes attached to the wash manifold and communicatingwith the single passage therein, means for supplying washing solution tothe wash manifold, a fitting mounted in the compartment to rotate on thesame axis as the wash manifold and fixed to the closed outer end of thewash manifold, a revolving rinse assembly fixed to the fitting, andmeans for supplying rinsing liquid to the fitting, the fittingcommunicating with the revolving rinse assembly, whereby both therevolving rinse assembly and the Wash manifold and the spray tubesattached thereto may be tilted as a unit about a horizontal axis.

3. In a dishwashing machine, in combination, a washing solutioncompartment, a fitting rotatably mounted in the compartment, means forsupplying rinsing liquid to the fitting, a wash manifold having a closedouter end fixed to the rotatable fitting and having a horizontal axis ofrotation, there being only a single passage within the manifold, atleast one slotted spray tube attached to the wash manifold andcommunicating with the single passage therein, means for supplyingwashing solution to the wash manifold, and a revolving rinse assemblycarried by the rotatable fitting, the rotatable fitting providing apassage between the means for supplying rinsing liquid and the revolvingrinse assembly, whereby the revolving rinse assembly and the washmanifold may be tilted as a unit about said horizontal axis of rotation.

4. A wash and rinse assembly for a dishwashing machine comprising arotatable wash manifold having a closed outer end, there being only asingle passage within the manifold, at least one spray tube carried bythe wash manifold and communicating with the single passage therein andextending transverse to the axis of rotation of the wash manifold, arotatable fitting fixed to the closed outer end of the wash manifold,and a revolving rinse assembly fixed to the fitting.

5. In a dishwashing machine, in combination, a rotatable wash manifoldhaving a closed outer end, there being only a single passage within themanifold, at least one wash tube carried by the wash manifold andcommunicating with the single passage therein and extending transverseto the axis of rotation of the wash manifold, a rotatable T fixed to theclosed outer end of the wash manifold, a revolving rinse assembly fixedto the T and communicating therewith, means for supplying washingsolution to the wash manifold, and means for supplying rinsing liquid tothe T.

References Cited in the file of this patent UNITED STATES PATENTS1,466,192 Schmelzer Aug. 28, 1923 1,507,909 Davis Sept. 9, 19241,675,192 Murdoch June 26, 1928 1,738,839 McClintock Dec. 10, 19292,031,816 Blakeslee Feb. 25, 1936 2,051,233 Webb Aug. 18, 1936 2,264,846Huebsch Dec. 2, 1941

